Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.9–3 dm, densely pubescent proximally, trichomes short-stalked, 5–12-rayed, 0.1–0.3 mm, sparsely pubescent to glabrescent distally.

usually 1–4 per caudex branch, usually arising from center of rosette near ground surface, rarely arising laterally proximal to sterile shoots, 1.5–8(–10.2) dm, glabrous or sparsely pubescent proximally, trichomes sessile, usually 2-rayed, rarely simple, 0.3–0.7 mm, glabrous distally.

blade linear-oblanceolate, 2–5 mm wide, margins entire, not ciliate, surfaces densely pubescent, trichomes short-stalked, 5–12(–16)-rayed, 0.1–0.3 mm.

blade oblanceolate, 1.5–8(–14) mm wide, margins usually entire, rarely dentate, ciliate, trichomes (sessile, usually 2-rayed, rarely simple ones at petiole base), surfaces usually pubescent, sometimes glabrous, trichomes sessile, 2-rayed (malpighiaceous), 0.3–0.7 mm.

1–5, not concealing stem;

blade without auricles, surfaces of distalmost leaves pubescent.

6–52, concealing stem proximally;

blade auricles 0.5–3 mm, surfaces of distalmost leaves glabrous.

4–15(–20)-flowered, unbranched.

8–35(–80)-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals purple to lavender, 3.5–6 × 1–1.5 mm, glabrous;

pollen ellipsoid.

erect at anthesis;

sepals glabrous;

petals white (usually aging pale lavender), (5–)7–11 × 1.5–2.7 mm, glabrous;

pollen ellipsoid.

ascending, straight, 4–15(–25) mm, pubescent, trichomes appressed, branched.

erect, straight, 5–18(–25) mm, glabrous.

divaricate-ascending, not appressed to rachis, not secund, straight, edges parallel, 4–7.3 cm × 2.7–4 mm;

valves glabrous;

ovules 44–52 per ovary;

style 0.05–0.1 mm.

erect, appressed to rachis, not secund, straight, edges parallel, 4–9(–10.2) cm × 1.5–3.5 mm;

valves glabrous;

ovules 110–216 per ovary;

style 0.05–0.3 mm.

uniseriate, 1.9–2.3 mm in diam.;

wing continuous, 0.3–0.5 mm wide.

biseriate, 1.3–2.2 × 1–1.6 mm;

wing lateral and distal, 0.3–0.8 mm wide.

= 14.